Gate road dinting equipment

ABSTRACT

The present invention relates to gate road dinting equipment comprising a rapidly advancing coal mining face and a gate road conveyer consolidated in such a manner that a dinting machine of the ranging type is set in place on a skid with a charge conveyer fixed thereon for removing a floor by a cutting drum of the dinting machine and for adjusting the height of the charge conveyer properly, so that a proper excavation height can be maintained for a discharge conveyer and face equipment as well.

Kalrajima GATE ROAD DINTING EQUIPNT [75] Inventor: Shigeo Kaliajilma,Kushiro, Japan [73] Assignee: Taiheiyo Coal Mining C0,, Ltd, Tokyo,Japan 221 Filed: lFeb.12,1973

21 App1.N0.:331,479

[52] US. Cl. 299/43, 299/ 18 [51 Int. Cl. EZlc 27/18 [58] Field ofSearch 299/18, 34, 39, 43, 44, 299/45, 46, 64

[56] References Cited FOREIGN PATENTS OR APPLICATIONS 1,092,241 11/1967Great Britain 299/43 11] 3,834,762 Sept. W, 1974 1,277,186 9/1968Germany 299/43 Primary Examiner-Ernest R. Purser Attorney, Agent, orFirm-George B. Oujevolk [57] ABSACT The present invention relates togate road dinting equipment comprising a rapidly advancing coal miningface and a gate road conveyer consolidated in such a manner that adinting machine of the ranging type is set in place on a skid with acharge conveyer fixed thereon for removing a floor by a cutting drum ofthe dinting machine and for adjusting the height of the charge conveyerproperly, so that a proper excavation height can be maintained for adischarge conveyer and face equipment as well.

1 Claim, 3 Drawing Figures GATE ROAD DINTIING EQUIPMENT BACKGROUND OFTHE INVENTION The present invention relates to dinting equipment.Dinting is defined as excavating and removing a layer of floor to gainheadroom (Paul W. Thrush, Dictionary of Mining, Mineral and RelatedTerms, U.S. Department of Interior, 1968).

BRIEF DESCRIPTION OF THE PRIOR ART According to the aforesaid MiningDictionary, a heave is defined as: A rising of the floor of a mine.

Generally the floor heaving is caused by rock pressure. When heavingoccurs at the face along a gate road, this causes the height of a skidloaded with a charge conveyer and other items to be subjected tofluctuations, thus resulting in an obstruction to the transportation ofcoal. The floor thus subjected to a heave was formerly scraped off bymanpower; therefore, the usual practice taken at present is for themining operation to be suspended for a while and the floor under theskid is scraped out every time when a heave of the floor takes shape.

The primary objective of the present invention is to provide gate roaddinting equipment that is capable of removing floor heave caused by theground pressure which has occurred preceding the face advance by theadjustment of a dinting machine in the height by the proper operation ofa lifting jack, by putting a shifter in operation, and by revolving thecutting drum of a dinting machine, thus enabling the movement of variouspieces of equipment, including coal mining equipment and coaltransporting equipment, and consolidating the operation in the gate roadand on the mining face in a rational and reasonable manner, so as tocarry out rapid coal mining.

The second object of the present invention lies in providing such a gateroad dinting equipment that makes possible the movement of a faceconveyer by setting in place on the charge conveyer the returningsection of a belt and a rope frame take-up motion, and the chargeconveyer in a continuous manner.

The objects set forth above can be attained by the improvement,combination and operation of the respective sections constituting thepresent invention, of which an illustration is shown in the drawingsattached hereto and the detailed description hereinafter set forth.

BRIEF DESCRIPTION OF THE DRAWINGS Shown in the drawings is anillustration of the present invention;

FIG. I is an elevation of the illustration,

FIG. 2 is a plan corresponding to FIG. I, and

FIG. 3 is an elevation of the belt stretcher employed in theillustration.

DETAILED DESCRIPTION OF THE INVENTION the tail end thereof, thusfacilitating discharge onto the belt. The charge conveyer I has a beltreturning section It) arranged on the skid thereof for the use of anextension belt conveyer 9, a rope frame I1 is arranged on each side ofthe belts in such a manner as to bend these belts, and a rope take-updevice 12 is arranged on each side of the charge conveyer I for takingup a wire rope ll.

7 is a dinting machine of the ranging type to be driven eitherelectrically or hydraulically; this dinting machine has a rangingmechanism capable of cutting up to 1.2 meters in height above thedinting depth and 3.5 meters in width of the entry, is positioned belowthe charge conveyer, and connected with the skid 2 by means of a shifter8. It is capable of cutting to the depth of approximately 1 meter of thefloor ahead from on the charge conveyer I, so as to facilitate themovement of the charge conveyer I.

Furthermore, the dinting machine 7 has a conveyer 33 arranged on theside thereof and transports to the charge conveyer I the waste materialcreated by the cutting bits set in place on the cutting drum of thedinting machine which is of the screw type. 13 is a selfadvancingsupport of which the lower section has such a shifter 14 thereon as isconnected with the face conveyer driving equipment 3 for automaticallyadvancing the conveyer by means of a jack by as much cutting as is doneby a hover, i.e., by the dinting machine 7. I5 is a gate self-advancingsupport, and connected with the said self-advancing support by means ofa slicing mechanism.

16 is a coal planer, which is an apparatus for discharging onto theconveyer the coal left after cutting by the drum shearer. The coalbreaker 4, has powerful teeth 17 of an angled roll arranged on theperiphery thereof, and revolves at high velocity, thus crushing largelumps of coal and so forth produced by the face equipment. 18 is alimber roller, 19 is a belt conveyer, 20 is a suspension for suspendinga wire rope, 21 is an anchor for holding the end of the wire rope 40through a wire pulley 39, 22 is a gate road, 23 is a ranging cuttingdrum of the dinting machine, and 24 is a face con veyer (hereinafter tobe termed as a face PC.) and is moved into a space exposed by cuttingthe face (700mm in stroke) by virtue of the shifter 14 built in theself-advancing support 13.

Now that the face PC. is combined with the skid 2 of the charge conveyerI into one unit, the whole of the charge conveyer is moved together withthe move of the face conveyer. The engine driving section 25 of theextension belt conveyer, is driven by an electric motor, and furnishedwith a take-up wheel 31 of the multiple stage pulley system which has along belt in storage arranged on the side of a return belt. The take-upwheel 31 is is slides on rails 37.

26 is a top pulley set in place at the top of the belt conveyer l9, and,27 and 28 are a front drum and a rear drum, respectively, set in placeon the engine driving section 25 of the extension belt conveyer.

30 is a belt stretcher of the wire winch type fixed on the stationaryposition by an anchor post 29, and is pulled by a wire rope 41 in such amanner as to given constant tension to the take-up wheel 31.

32 supports the roof ahead in such a manner as to be sufficient formoving the self-advancing support, while supporting the roof in analternating manner by this beam member 32 of the gate self-advancingsupport.

34 is a frame, and a roller 35 is arranged at several positions alongthe frame for the purpose of guiding the upper belt.

36 is a take-up pulley set in place on the take-up wheel 31, 37 is aguide rail, 21 is an anchor post, and 42 is a gutter-shaped plate set inplace at the top of the driving section 43 of the charge conveyer 1 andguides coal or the like transported by the charge conveyer 1 over to thebelt conveyer 19.

The invention operates as follows:

The floor of a gate road causes the skid with discharge conveyer 1 andso forth mounted thereon to be pushed up by lateral rock pressure thuscausing a change in the overall height of the charge conveyer 1. As aresult movement of coal is obstructed. The dinting machine 7 of theranging type capable of cutting to the depth of 1 meter is set in placeadjacent to the top front section of the discharge conveyer 1, a heavecan be properly removed by adjusting the height of the said dintingmachine 7 through the operation of the lifting jack 5 and byconcurrently revolving the ranging cutting drum 23. Furthermore, thecombination of the face RC. and the discharge conveyer 1 is maintainedat proper and constant height by advancing the dinting machine 7 throughthe operation of the shifter 8, thus preventing the face P.C. drivingsection from shearing upward. Therefore, the transporting capacity atthe face can be charged as it is to the gate, and coal transportingefficiency is thus improved.

Furthermore, the face conveyer 24 is moved to the space exposed bycutting the face (700mm in stroke) at the time of the moveof the facePC. by the shifter 14 built in the self-advancing support 13.

Now that the face conveyer 24 and the charge conveyer skid 2 arecombined into one entity, the discharge conveyer as a whole is movedtogether with the move of the 700mm face PC.

The discharge conveyer 1 has the belt return section for the beltconveyer set thereon; therefore, the loosened belt 19 automaticallypulls the take-up wheel motion by virtue of the conveyer stretcher 30 byas much the distance as has thus moved in such a manner as shown in FlG.3, so as removed is sagging of the belt loosened as a whole.

In addition thereto, a rope take-up 12 set in place on the chargeconveyer 1 causes a wire rope 11 to be given constant torque by apneumatic pressure mechanism or a hydraulic pressure mechanism totake-up the wire rope 11 instantaneously by as much as the distance ashas been loosened bythe movement of the charge conveyer 1, thus ensuringa smooth run of the conveyer belt set on the wire rope.

As the movement of the charge conveyer l advances, the limber rollers 18(rollers made of rubber in such a manner as to be set on or off atvarious places at liberty) 18 and the suspensions 20 are set offposition one following another.

Furthermore, the conventional dinting machines are of the anchor posttype and involve some defects in the drive thereof in case the roof issoft and fragile; meanwhile, the equipment introduced in the presentinvention has the advantage that it is capable of conducting a driver ina powerful manner as the base of a charge conveyer, and furthermore hassuch features that the charge conveyer 1 can to move in a continuousmanner concurrently with the move of the face PC. by setting the beltreturn section 10 and the rope take-up motion 12 thereon, that a surplusof a belt at the belt return section 10 is instantaneously taken up byan extension apparatus, and that a surplus rope on the rope frame 11 istaken up into the rope take-up motion 12 set in place on the chargeconveyer 1.

What is claimed is:

1. A mining machine comprising in combination a. an elongated skid (2)with a rear and front ends and a center, said skid having a dischargeconveyor (1) for carrying material in a downward direction from thefront to the rear, disposed on said skid at the front end thereof, acoal breaker (4) with teeth at said skid center, a rear shifter (14) atsaid rear end, a lifting jack (5) and a front shifter (8) at the frontend;

b. a dinting machine (7) at. said front end under said dischargeconveyor, said front shifter (8) coupling said dinting machine (7) andsaid skid (2), said lifting jack (5) serving to adjust the height of thedinting machine (7); and,

c. a dinting conveyor (33) connected to the dinting machine (7) disposedfor receiving cut material and carrying it upwards from the front to therear over the discharge conveyor and dumping it thereon; whereby when aheave is caused, the height of the discharge conveyor (1) is changed,the dinting machine then cuts the floor under said discharge conveyor,removes the heave and the waste cut material is carried out by thedinting conveyor (33) and dumped onto the discharge conveyor (1).

1. A mining machine comprising in combination a. an elongated skid (2)with a rear and front ends and a center, said skid having a dischargeconveyor (1) for carrying material in a downward direction from thefront to the rear, disposed on said skid at the front end thereof, acoal breaker (4) with teeth at said skid center, a rear shifter (14) atsaid rear end, a lifting jack (5) and a front shifter (8) at the frontend; b. a dinting machine (7) at said front end under said dischargeconveyor, said front shifter (8) coupling said dinting machine (7) andsaid skid (2), said lifting jack (5) serving to adjust the height of thedinting machine (7); and, c. a dinting conveyor (33) connected to thedinting machine (7) disposed for receiving cut material and carrying itupwards from the front to the rear over the discharge conveyor anddumping it thereon; whereby when a heave is caused, the height of thedischarge conveyor (1) is changed, the dinting machine then cuts thefloor under said discharge conveyor, removes the heave and the waste cutmaterial is carried out by the dinting conveyor (33) and dumped onto thedischarge conveyor (1).